Sitemap
A list of all the posts and pages found on the site. For you robots out there, there is an XML version available for digesting as well.
Pages
Posts
Future Blog Post
Published:
This post will show up by default. To disable scheduling of future posts, edit config.yml and set future: false.
Blog Post number 4
Published:
This is a sample blog post. Lorem ipsum I can’t remember the rest of lorem ipsum and don’t have an internet connection right now. Testing testing testing this blog post. Blog posts are cool.
Blog Post number 3
Published:
This is a sample blog post. Lorem ipsum I can’t remember the rest of lorem ipsum and don’t have an internet connection right now. Testing testing testing this blog post. Blog posts are cool.
Blog Post number 2
Published:
This is a sample blog post. Lorem ipsum I can’t remember the rest of lorem ipsum and don’t have an internet connection right now. Testing testing testing this blog post. Blog posts are cool.
Blog Post number 1
Published:
This is a sample blog post. Lorem ipsum I can’t remember the rest of lorem ipsum and don’t have an internet connection right now. Testing testing testing this blog post. Blog posts are cool.
portfolio
ERASMUS+ ‘Eclipsing binaries and asteroseismology’ summer school
In 09/2022 I attended a one-week summer school at IAC La Palma, with lecturers including David Jones (IAC), Henri Boffin (ESO Garching), and Cole Johnston. I acquired traning in the combined study of eclipsing binaries and asteroseismic oscillations, with a particular focus on coherent pulsators.
Stellar spectroscopy school, University of Tartu
In 09/2023 I attended a short stellar spectroscopy school online, held at the University of Tartu. It covered the theory of stellar atmospheres and stellar spectroscopy, including hands-on sessions on atmospheric parameter determination and abundance analysis.
Advanced PHOEBE workshop, Ljubljana University
In 06/2024 I attended a workshop on advanced usage of the PHOEBE 2 eclipsing binary software. I collaborated with the PHOEBE developers and attendees to improve the software and our usage skills.
Science Visist at the Astrophysics Group at Keele University
From 01-04/2025 I visited the eclipsing binary experts Pierre Maxted and John Southworth (the authors of the ellc and JKTEBOP codes) to collaborate. I learned and performed detailed ‘noise’ modeling of stochastic (solar-like) oscillations during eclipsing binary model fitting, with the use of Gaussian process regression.
Science Visit at the Nordic Optical Telescope, La Palma
From 11-12/2025 I visited the NOT, and performed high-precision radial velocity analysis of standard star observations of sigma Dra, at the request of the NOT staff. I used it to characterise their instrument performance to be 5 m/s over a 10 month observing duration. See my report on it for details
publications
GRB 220623A: NOT optical observations
Published in GRB Coordinates Network, 2022
We performed optical observations of the gamma-ray burst GRB 220623A with the Nordic Optical Telescope.
Establishing the accuracy of asteroseismic mass and radius estimates of giant stars - II. Revised stellar masses and radii for KIC 8430105
Published in Monthly Notices of the Royal Astronomical Society, 2022
I performed a re-analysis of the eclipsing binary KIC8430105 hosting an oscillating red giant with new high precision radial velocity measurements, with a significant change in mass and radius measurements over previous analyses, as well as a large improvement in precision. We supplemented this with new spectroscopic and asteroseismic analyses, and compared the eclipsing binary measurements directly with asteroseismic scaling relations.
Geem et al. 2023. Spectral type and geometric albedo of (98943) 2001 CC21, the Hayabusa2# mission target
Published in Monthly Notices of the Royal Astronomical Society: Letters, 2023
We characterized the spectral type and geometric albedo of the asteroid 2001 CC21 using polarimetry. I participated in the observing effort at the Nordic Optical Telescope.
Farnocchia et al. 2023. The Second International Asteroid Warning Network Timing Campaign: 2005 LW3
Published in The Planetary Science Journal, 2023
We determined the timing performance of asteroid warning networks using the asteroid 2005 LW3. I performed the observations at the Nordic Optical Telescope.
Brogaard et al. 2023. Asteroseismic age estimate of the open cluster NGC 6866 using Kepler and Gaia
Published in Astronomy & Astrophysics, 2023
We used oscillating red giants in the open cluster NGC 6866 to determine the RGB mass of the cluster and constrain convective-core overshoot, and thereby obtain a precise measure of the cluster age. I performed asteroseismic and photometric Monte Carlo and Markov Chain Monte Carlo simulations to explore statistical significance and observational biases, and participated in the scientific discussion of the results.
Grisoni et al. 2024. K2 results for ‘young’ alpha-rich stars in the Galaxy
Published in Astronomy & Astrophysics, 2024
We used precise asteroseismic ages together with detailed survey kinematics and spectroscopy to explore a sample of seemingly young (massive) stars within the old population of Milky Way disk stars. We found that their occurence rates and general properties suggest that they are products of binary mergers or mass accretion, rather than being genuinely young stars. I provided scientific perspective on binary stars and binary interaction, as well as general scientific comments on the manuscript and the significance of the results.
Brogaard et al. 2024. Connecting integrated red giant branch mass loss from asteroseismology and globular clusters
Published in Astronomy & Astrophysics, 2024
We used a catalogue of measurements of stellar masses obtained with asteroseismology together with survey spectroscopy (APOGEE DR17), parallaxes (Gaia DR3), and photometry (2MASS), in order to derive integrated mass loss rates of the of the Milky Way thick disk stars. This was done by comparing the masses of RGB stars (hydrogen-shell burning) to that of the more evolved core-Helium burning stars. I contributed scientific discussion on the statistics of the sample measurements, and provided scientific comments on the study and manuscript.
Mazzi et al. 2025. DUETS: Setting expectations for asteroseismic binaries and binary products with synthetic populations
Published in Astronomy & Astrophysics, 2025
We performed stellar population synthesis of the Kepler space mission field, and used this to derive expected asteroseismic binary fractions as a function of evolutionary stage, including the impact of binary interaction. I contributed majorly to the direction of the project and the scientific discussion, interpretation, and dissemination throughout the full length of the project.
Advancing the accuracy in age determinations of old-disk stars using an oscillating red giant in an eclipsing binary
Published in Astronomy & Astrophysics, 2025
I led this high-precision study of the only old red giant hosting eclipsing binary with high enough asteroseismic data quality to validate the stellar mass against eclipsing binary analysis at the 1.4% level. We managed to obtain a 6% agreement on the age, and thereby affirm the use of precise asteroseismology for Galactic Archaeology.
Brogaard et al. 2025. Attempting an accurate age estimate of the open cluster NGC 6633 using CoRoT and Gaia
Published in (accepted for publication in) Astronomy & Astrophysics, 2025
We used light curve photometry for red giants in NGC6633 from CoRoT together with Gaia parallaxes and spectroscopy, in order to constrain the age of the cluster. I contributed scientific discussion on the statistics of the sample measurements, and provided scientific comments on the study and manuscript. I provided significant feedback on both the scientific results and the dissemination in the manuscript, throughout the full length of the project.
talks
Obtaining 1% accuracy on asteroseismic Red Giant mass and radius using Eclipsing binaries
Published:
Obtaining 1% accuracy on asteroseismic Red Giant mass and radius using Eclipsing binaries
Published:
Detection of spectroscopic (SB2) binaries
Published:
teaching
Teaching experience 1
Undergraduate course, University 1, Department, 2014
This is a description of a teaching experience. You can use markdown like any other post.
Teaching experience 2
Workshop, University 1, Department, 2015
This is a description of a teaching experience. You can use markdown like any other post.